CN109915141A - The control method of not wide protection pillar mining roadway bump - Google Patents
The control method of not wide protection pillar mining roadway bump Download PDFInfo
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- CN109915141A CN109915141A CN201910296251.1A CN201910296251A CN109915141A CN 109915141 A CN109915141 A CN 109915141A CN 201910296251 A CN201910296251 A CN 201910296251A CN 109915141 A CN109915141 A CN 109915141A
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Abstract
The present invention proposes a kind of control method of not wide protection pillar mining roadway bump, it is as follows: before mining roadway driving, Relieving way is arranged on the top plate of not wide protection pillar first, then blasting boreholes are beaten into coal seam on the bottom plate of Relieving way and manufacture a loose distressed zone, when working face mining is advanced in the danger zone of mining roadway, along towards the side of Relieving way, at interval of 12-15m, tunnel release chamber, drillhole blasting is carried out to the direction of Relieving way in chamber, by forming crannied body dissipation coal column impact energy between explosion chamber, play the role of buffer protection to mining roadway, ensure the safety during the entire use in tunnel.
Description
Technical field
The invention belongs to coal mining technology fields.
Background technique
China's deep coalmine is more and more, and mine pressure is on the rise with pressure bump behavior, and especially bump problem is
Dynamic disaster urgently to be solved, China's Deep Mine complex geologic conditions are changeable, more arrive geology of deep part factor more play decision and make
With.When arranging Stope face before coal mining, need to open up mining roadway, mining roadway mainly includes air return way and fortune
Defeated crossheading.Some deep old mines are since geological condition is complicated, and often there are not wide shield lane coals between about two working faces
Column.Since mining roadway is arranged in coal seam, not wide protection pillar size is big, buried depth is big, the quiet Dynamic stress field of working face compared with
Greatly, there is thump tendency, be easy to happen bump during mining roadway driving, and attached again during working face mining
Add dynamic stress, the shock hazard of mining roadway more increases.Take conventional coal-bed flooding, strong supporting, coal seam strong at present
The measures such as release, disconnected top, disconnected bottom, it is difficult to achieve the effect that clear.Up to the present, there are no be directed to these specific coal seams
Condition forms the Control Technology system of system.Especially not wide coal column will lead to high-level punching due to lateral high stress
Energy release is hit, is easy to cause locality stress to concentrate in coal column region, presses possibility to greatly increase damaging impact occurs.
Therefore the bump prevention and control problem of not wide coal column mining roadway, up to the present there are no really fundamentally solved
Certainly.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes a kind of control method of not wide protection pillar mining roadway bump.
This method passes through the technical measures for taking in advance and changing stress distribution, energy segmentation, dissipate, and reaches the mesh of prevention and treatment bump
's.
The technical scheme is that
A kind of control method of not wide protection pillar mining roadway bump, as follows:
One, the broken top Relieving way of driving
Before mining roadway driving, arrange Relieving way on the top plate of not wide protection pillar first, Relieving way with adopt
Field tunnel is arranged in parallel, and between 12-15m between level, blasting boreholes are then beaten into coal seam on the bottom plate of Relieving way,
It destroys ground coal to form crushing medium after explosion, manufactures a loose distressed zone, thus change lateral high stress distribution,
It carries out preventing bump when the tunneling construction of mining roadway；
Two, coal column release drainage is manufactured
In working face mining, when in the danger zone for being advanced to mining roadway, along towards the side of Relieving way, every
Every 12-15m, release chamber is tunneled, release chamber depth 5-6m carries out drillhole blasting to the direction of Relieving way in chamber,
By forming crannied body between explosion chamber, relieving roadway tunnel couples to form weak structure with chamber group, and it is larger to produce width
Plane release drainage, stop and absorb external impact distortional stress in invading, dissipation coal column impact energy plays mining roadway
The effect of buffer protection；
Three, release validity check
After release drainage is formed, detects and drill in two chamber intermediate arrangements, mount stress meter in drilling, monitor stress variation, with
Relative stress, which mutates, is used as judgment criterion, illustrates no complete pressure release if any jumping phenomenon；Meanwhile in entire coal column region
Release validity check is carried out using common drilling cuttings method, with 42 drill bit of ф in the perforating of tunnel two sides, eye depth 7.0-8.0m, the elevation angle 0 ~
3 °, eye distance 5.0-10m, illustrate no complete pressure release when occurring exceeded such as test effect；At this point, it is quick-fried to continue perforating in chamber
It is broken, release is carried out, until risk is thoroughly eliminated, it is ensured that the safety during the entire use in tunnel.
The positive effect of the present invention is:
1, by implementing broken top technology to top plate, stress distribution is changed, by stress to mined out to transfer, is belonged to from coal seam top
Stress relief is carried out, fundamentally cuts off and changes stress and gather range；
2, the protection of heading forms software by explosion in chamber group, plays the role of protecting wall to tunnel, ensured tunnel
The way of escape and its safety for using whole process.
Detailed description of the invention
Fig. 1 is Relieving way and chamber plan view；Fig. 2 is Fig. 1 A-A to enlarged drawing, shows relieving roadway in figure
Road and chamber facade deployment scenarios.
Specific embodiment
Certain mine exploits not wide protection pillar stope, arranges Stope face before exploiting, tunnels mining roadway, mining roadway
Including tunneling air return way and haulage gate etc..Below for tunneling air return way, the present invention is further illustrated in conjunction with attached drawing
Technical solution.
As shown in Figure 1, 2, the control method of not wide protection pillar mining roadway bump is as follows:
One, the broken top Relieving way of driving
Before stope air return way driving, Relieving way, Relieving way are arranged on the top plate of not wide protection pillar first
It is arranged in parallel with air return way (mining roadway), between horizontal space a=12-15m, then to coal on the bottom plate of Relieving way
Blasting boreholes are beaten in layer, destroy ground coal to form crushing medium after explosion, manufacture a loose distressed zone, to change lateral high
Stress distribution prevents bump when carrying out the tunneling construction of air return way；
Two, coal column release drainage is manufactured
In working face mining, when in the danger zone for being advanced to mining roadway, along towards the side of Relieving way, at interval of
12-15m tunnels release chamber, and release chamber depth 5-6m carries out drillhole blasting to the direction of Relieving way in chamber, leads to
It crosses between explosion chamber and forms crannied body, relieving roadway tunnel couples to form weak structure with chamber group, and it is biggish to produce width
Plane release drainage stops and absorbs the interior of external impact distortional stress to invade, and dissipation coal column impact energy plays air return way slow
Rush the effect of protection；
Three, release validity check
After release drainage is formed, drilling, mount stress meter in drilling are detected in the intermediate arrangement of two chambers, monitoring stress of coal seam becomes
Change, is mutated using relative stress as judgment criterion, illustrate no complete pressure release if any jumping phenomenon；Meanwhile in entire coal
Columnar region carries out release validity check using common drilling cuttings method, with diameter 42mm drill bit in the perforating of tunnel two sides, eye depth 7.0-
8.0m, 0 ~ 3 °, eye distance 5.0-10m of the elevation angle illustrate no complete pressure release when occurring exceeded such as test effect；At this point, should be in chamber
Middle continuation perforating explosion carries out release, until risk is thoroughly eliminated, it is ensured that the safety during the entire use of air return way.
Claims (1)
1. a kind of control method of not wide protection pillar mining roadway bump, as follows:
(1) the broken top Relieving way of driving
Before mining roadway driving, arrange Relieving way on the top plate of not wide protection pillar first, Relieving way with adopt
Field tunnel is arranged in parallel, and between 12-15m between level, blasting boreholes are then beaten into coal seam on the bottom plate of Relieving way,
It destroys ground coal to form crushing medium after explosion, manufactures a loose distressed zone, thus change lateral high stress distribution,
It carries out preventing bump when the tunneling construction of mining roadway；
(2) coal column release drainage is manufactured
In working face mining, when in the danger zone for being advanced to mining roadway, along towards the side of Relieving way, every
Every 12-15m, release chamber is tunneled, release chamber depth 5-6m carries out drillhole blasting to the direction of Relieving way in chamber,
By forming crannied body between explosion chamber, relieving roadway tunnel couples to form weak structure with chamber group, and it is larger to produce width
Plane release drainage, stop and absorb external impact distortional stress in invading, dissipation coal column impact energy plays mining roadway
The effect of buffer protection；
(3) release validity check
After release drainage is formed, detects and drill in two chamber intermediate arrangements, mount stress meter in drilling, monitor stress variation, with
Relative stress, which mutates, is used as judgment criterion, illustrates no complete pressure release if any jumping phenomenon；Meanwhile in entire coal column region
Release validity check is carried out using common drilling cuttings method, with 42 drill bit of ф in the perforating of tunnel two sides, eye depth 7.0-8.0m, the elevation angle 0 ~
3 °, eye distance 5.0-10m, illustrate no complete pressure release when occurring exceeded such as test effect；At this point, it is quick-fried to continue perforating in chamber
It is broken, release is carried out, until risk is thoroughly eliminated, it is ensured that the safety during the entire use in tunnel.
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| CN201910296251.1A CN109915141A (en) | 2019-04-13 | 2019-04-13 | The control method of not wide protection pillar mining roadway bump |
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| CN201910296251.1A CN109915141A (en) | 2019-04-13 | 2019-04-13 | The control method of not wide protection pillar mining roadway bump |
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Cited By (5)
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| CN111236942A (en) * | 2020-03-09 | 2020-06-05 | 天地科技股份有限公司 | Pressure relief method for rock burst coal seam |
| CN111502662A (en) * | 2020-04-28 | 2020-08-07 | 中煤能源研究院有限责任公司 | Prevention and control method for deep pressure relief shallow part reinforcement of rock burst mine advanced coal body |
| CN112483182A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of high-homogeneity coal seam by window intervention method |
| CN112483180A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of lateral large mining roof slab structure type by window intervention method |
| CN112554952A (en) * | 2020-12-18 | 2021-03-26 | 山东科技大学 | Method for judging impact risk of three hard coal seams by window strong-damage method |
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| CN111502662B (en) * | 2020-04-28 | 2021-12-14 | 中煤能源研究院有限责任公司 | Prevention and control method for deep pressure relief shallow part reinforcement of rock burst mine advanced coal body |
| CN112483182A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of high-homogeneity coal seam by window intervention method |
| CN112483180A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of lateral large mining roof slab structure type by window intervention method |
| CN112554952A (en) * | 2020-12-18 | 2021-03-26 | 山东科技大学 | Method for judging impact risk of three hard coal seams by window strong-damage method |
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Address after: 266590 No. 579, Bay Road, Huangdao District, Shandong, Qingdao Applicant after: Shandong University of Science and Technology Address before: 271000 Shandong Province, Tai'an city Taishan District mountain Street No. 223 Tai'an campus of Shandong University of Science and Technology Applicant before: Shandong University of Science and Technology |
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Application publication date: 20190621 |